:root {
  --pink: #ec4899;
  --pink-dark: #be1e6e;
  --teal: #14b8a6;
  --teal-dark: #0d9488;
  --grad: linear-gradient(135deg, #ec4899 0%, #14b8a6 100%);

  --bg: #fff5fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --text: #2a1726;
  --text-soft: #6b5462;
  --border: #f3cfe4;
  --shadow: 0 8px 28px rgba(236, 72, 153, 0.14);
  --focus: #14b8a6;
  --danger: #e11d48;
  --radius: 16px;
}

[data-theme="dark"] {
  --bg: #160e16;
  --bg-soft: #1f1320;
  --card: #251627;
  --text: #fbeef6;
  --text-soft: #c7a9bd;
  --border: #3d2438;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  --focus: #2dd4bf;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  overflow-x: hidden;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--pink);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 12px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  background: rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  color: #fff;
  flex: none;
}
.app-header h1 {
  font-size: 1.25rem;
  margin: 0;
  letter-spacing: 0.2px;
  white-space: nowrap;
}
.header-actions { display: flex; align-items: center; gap: 8px; }

/* ---------- Buttons ---------- */
.btn {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 12px;
  padding: 10px 16px;
  font-weight: 600;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease, opacity .12s ease;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 6px 18px rgba(236, 72, 153, .35);
}
.btn-primary:not(:disabled):hover { box-shadow: 0 10px 24px rgba(236, 72, 153, .45); }

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, .6);
}
.controls .btn-ghost {
  color: var(--text-soft);
  border-color: var(--border);
}
.controls .btn-ghost:hover { border-color: var(--pink); color: var(--pink); }

.btn-icon {
  background: rgba(255, 255, 255, .2);
  color: #fff;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  font-size: 1.1rem;
  padding: 0;
}
.btn-block { width: 100%; margin-top: 8px; }

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}
@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .preview { order: -1; }
}

.panel { min-width: 0; }
.controls { display: flex; flex-direction: column; gap: 14px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.card-title {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--pink);
  letter-spacing: .2px;
}
[data-theme="dark"] .card-title { color: #f9a8d4; }

.hint { margin: 6px 0; font-size: .82rem; color: var(--text-soft); }
.hint.center { text-align: center; }
.count { margin: 10px 0 4px; font-size: .85rem; font-weight: 600; color: var(--teal-dark); }
[data-theme="dark"] .count { color: var(--teal); }

/* ---------- File button ---------- */
.filebtn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}
.filebtn span { font-size: 1.3rem; line-height: 1; }
.filebtn:hover { box-shadow: 0 8px 20px rgba(236, 72, 153, .35); }
.filebtn:focus-within { outline: 3px solid var(--focus); outline-offset: 2px; }

/* ---------- Thumbnails ---------- */
.thumbs {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
}
.thumb {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
}
.thumb img {
  width: 48px; height: 48px;
  object-fit: cover;
  border-radius: 8px;
  flex: none;
  background: #ddd;
}
.thumb-pos {
  width: 24px; height: 24px;
  display: grid; place-items: center;
  background: var(--grad);
  color: #fff;
  border-radius: 50%;
  font-size: .78rem;
  font-weight: 700;
  flex: none;
}
.thumb-name {
  flex: 1;
  min-width: 0;
  font-size: .8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.thumb-controls { display: flex; gap: 4px; flex: none; }
.mini {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 8px;
  width: 30px; height: 30px;
  cursor: pointer;
  font-size: .9rem;
  display: grid; place-items: center;
}
.mini:hover { border-color: var(--pink); color: var(--pink); }
.mini.del:hover { border-color: var(--danger); color: var(--danger); }
.mini:disabled { opacity: .35; cursor: not-allowed; }

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s ease;
}
.chip:hover { border-color: var(--teal); }
.chip[aria-checked="true"] {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}

/* ---------- Fields ---------- */
.field { margin-bottom: 14px; }
.field:last-child { margin-bottom: 0; }
.field label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.field output { color: var(--teal-dark); font-weight: 700; }
[data-theme="dark"] .field output { color: var(--teal); }

input[type="range"] {
  width: 100%;
  accent-color: var(--pink);
  height: 28px;
}

.color-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
input[type="color"] {
  width: 54px; height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  cursor: pointer;
  padding: 2px;
}
.swatches { display: flex; gap: 6px; flex-wrap: wrap; }
.swatch {
  width: 28px; height: 28px;
  border-radius: 8px;
  border: 2px solid var(--border);
  cursor: pointer;
  padding: 0;
}
.swatch:hover, .swatch:focus-visible { transform: scale(1.1); border-color: var(--pink); }

/* ---------- Preview ---------- */
.preview {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 84px;
}
@media (max-width: 880px) {
  .preview { position: static; }
}
.preview-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}
.badge {
  font-size: .78rem;
  font-weight: 700;
  color: var(--teal-dark);
  background: rgba(20, 184, 166, .12);
  padding: 4px 10px;
  border-radius: 999px;
}
[data-theme="dark"] .badge { color: var(--teal); }

.canvas-wrap {
  position: relative;
  width: 100%;
  display: grid;
  place-items: center;
  background:
    repeating-conic-gradient(var(--border) 0% 25%, transparent 0% 50%) 50% / 22px 22px;
  border-radius: 12px;
  overflow: hidden;
  min-height: 220px;
}
#canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}
#canvas.hidden { display: none; }

.empty-state {
  text-align: center;
  color: var(--text-soft);
  padding: 40px 16px;
}
.empty-emoji { font-size: 2.6rem; margin-bottom: 8px; }
.empty-state.hidden { display: none; }

/* ---------- Toast ---------- */
.toast-wrap {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
  width: min(92vw, 420px);
  pointer-events: none;
}
.toast {
  background: var(--text);
  color: var(--bg-soft);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: .9rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease;
  border-left: 4px solid var(--teal);
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.err { border-left-color: var(--danger); }
.toast.ok { border-left-color: var(--teal); }

/* ---------- Footer ---------- */
.app-footer {
  text-align: center;
  padding: 18px;
  color: var(--text-soft);
  font-size: .8rem;
}

/* ---------- Focus ---------- */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}